Synthesis of 1,4-Diketones from β-Oxo Esters and Enol Acetates by Cerium-Catalyzed Oxidative Umpolung Reaction
作者:Irina Geibel、Jens Christoffers
DOI:10.1002/ejoc.201600057
日期:2016.2
esters are converted with enol acetates in a cerium‐catalyzed, oxidative Umpolung reaction to furnish 1,4‐diketones with up to 95 % yield. Atmospheric oxygen is the oxidant in this process, which can be regarded as ideal from economic and ecological points of view. Further advantages of this new C–C coupling reaction are its operational simplicity and the application of nontoxic and inexpensive CeCl3
摘要 在铈催化的氧化 Umpolung 反应中,环状 β-氧代酯与烯醇乙酸酯转化,以高达 95% 的产率提供 1,4-二酮。大气氧是这个过程中的氧化剂,从经济和生态的角度来看,它可以被认为是理想的。这种新的 C-C 偶联反应的其他优点是其操作简单,并且可以使用无毒且廉价的 CeCl3·7H2O 作为预催化剂。